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A magnetic-field technique for stabilizing a He-Ne laser to 2parts in 1010has been patented. At 632.8 nm, what would be the coherence length of a laser with such frquency stability.
An object of mass 5.41 kg is released from rest and drops 2.05 m to the floor. The collision is completely inelastic. How much kinetic energy is lost during the collision
A 639keV x-ray photon scatters from an electron at rest, deflecting through 105°. What is the scattered photon's energy
A volume of nitrogen gas has a density of 1.15 kg/m3 and a pressure of 1.07 atm. Find the temperature of the gas and the rms speed of its molecules
A rectangular metal block is 0.6 m long, 0.2 m wide, and 0.1 m tall. The block weighs 270 N. What is the density of the fluid
A 0.32 kg body undergoes simple harmonic motion of amplitude 9.1 cm and period 0.40 s. What is the magnitude of the maximum force acting on it
Jack was exposed to fast neutrons; he received a radiation dose of 280rem on part of his hand, affecting 30.0grams of tissue. What was the total energy of the radiation Jack received
A plane mirror and the concave mirror (f = 8.70 cm) are facing each other and are separated by a distance of 23.0 cm. An object is placed between the mirrors and is 11.5 cm from each mirror.
An airplane needs to reach a velocity of 402km/h to take off. On a 2000 m runway, what is the minimum acceleration necessary for the plane to take flight.
An object with mass 3.8{\rm kg} is attached to a spring with spring stiffness constant 220{\rm N/m} and is executing simple harmonic motion. When the object is 2.1×10?2{\rm m} from its equilibrium position, it is moving with a speed of 0.55 {\rm m..
A current-carrying wire of length 0.5m is at the Equator. Assuming that the magnetic field of the Earth has magnitude of 5 x 10^-5 T, what current is required to allow the wire to be suspended
An oscillator with a mass of 500 g and a period of 0.50s has an amplitude that decreases by 1.0% each complete oscillation. If the initial amplitude is 20 cm, what will be the amplitude after 21 oscillations?
What is the wavelength of the electromagnetic waves used for cell phone communications in the 900-MHz band?
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